The Daily App Deals post is a round-up of the best app discounts of the day, as well as some notable mentions for ones that are on sale.

The Best

Piano Notes Pro (iTunes) Previously $2.99, now Free. Piano Notes Pro for iPad will help you to learn how to play the piano strictly from your iPad. Whether you are beginning to learn how to play the piano, are a long-time piano teacher that needs an aid to help teach, or even a piano veteran that wants to practice their craft, Piano Notes Pro will improve your skills in no time. Get it for Free. (via LogicBuy)